Teeth whitening instrument



FIG. 1 is a top, front and right side perspective view of teeth whitening instrument, showing my new design;

FIG. 2 is a rear perspective view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a right side elevational view thereof;

FIG. 7 is a top plan view thereof; and,

FIG. 8 is a bottom plan view thereof.

The broken lines in the drawings illustrate the portions of the teeth whitening instrument, which form no part of the claimed design. 

CLAIM The ornamental design for teeth whitening instrument, substantially as shown and described. 